2541865845906 has 20 divisors (see below), whose sum is σ = 5695662358782. Its totient is φ = 847288615248.

The previous prime is 2541865845851. The next prime is 2541865845973. The reversal of 2541865845906 is 6095485681452.

2541865845906 is a `hidden beast` number, since 2 + 5 + 41 + 8 + 6 + 584 + 5 + 9 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2287532226681 + 254333619225 = 1512459^2 + 504315^2 .

It is a super-2 number, since 2×2541865845906² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7845264795 + ... + 7845265118.

Almost surely, 2^{2541865845906} is an apocalyptic number.

2541865845906 is an abundant number, since it is smaller than the sum of its proper divisors (3153796512876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2541865845906 is a wasteful number, since it uses less digits than its factorization.

2541865845906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15690529927 (or 15690529918 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 63.

The spelling of 2541865845906 in words is "two trillion, five hundred forty-one billion, eight hundred sixty-five million, eight hundred forty-five thousand, nine hundred six".